CVE-2026-91721: Critical Use after free in Internals

Q: What does an attacker need to exploit this issue?

The attacker needs to cause a user to load a crafted HTML page. The issue is described as remotely exploitable and may allow arbitrary code execution outside Chrome's sandbox.

Q: Which Chrome versions are affected?

Google Chrome versions prior to 153.0.8010.47 are affected. Updating to 153.0.8010.47 or later addresses the affected version range.

Published Sep 15, 2026

Updated

Chromium CVE-2026-91721: Use after free

Other sources

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases](https://chromereleases.googleblog.com/2026)) for more information.

— Microsoft

Use after free in Internals in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

— MITRE

Affected Software

3 affected componentsFixes available

Google Google Chrome<153.0.8010.47

Google Chrome<153.0.8010.47

Microsoft Edge (Chromium-based)<153.0.4234.46

153.0.4234.46

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.0.4234.46
Upgrade
Upgrade Google Chrome to a version that resolves this vulnerability.
Fixed in 153.0.8010.47

Event History

Sep 15, 2026

CVE Published

via MITRE·08:41 PM

Data Sourced

via MITRE·08:41 PM

DescriptionWeakness

Data Sourced

via NVD·09:16 PM

DescriptionSeverityWeaknessAffected Software

Sep 18, 2026

Data Sourced

via Microsoft·04:42 AM

DescriptionSeverityWeakness

Data Sourced

via Microsoft·04:42 AM

Affected Software

Updated

via Microsoft·04:42 AM

DescriptionSeverity

Oct 7, 2026

Data Sourced

12:00 AM

SeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

5652069569100777247

Frequently Asked Questions

What does an attacker need to exploit this issue?

The attacker needs to cause a user to load a crafted HTML page. The issue is described as remotely exploitable and may allow arbitrary code execution outside Chrome's sandbox.

Which Chrome versions are affected?

Google Chrome versions prior to 153.0.8010.47 are affected. Updating to 153.0.8010.47 or later addresses the affected version range.

CVE-2026-91721: Critical Use after free in Internals

Other sources

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What does an attacker need to exploit this issue?

Which Chrome versions are affected?

Company

Resources

Contact